<!DOCTYPE html>
<html xmlns:th="http://www.w3.org/1999/xhtml">
<head lang="en">
    <meta charset="UTF-8"/>
    <title></title>
    <style>
        .red {
            color: red;
            font-size: 15px;
        }
    </style>
</head>
<body>
<div>
    <a th:href="${host}" th:text="${host}" th:class="${clz}">Hello World</a>
</div>

</body>
</html>